共查询到20条相似文献，搜索用时 359 毫秒
1.
Determination and applications of chemical analysis to evaluate Jurassic hydrocarbon potentiality in Northern Iraq 总被引：1，自引：1，他引：0
Ahmed Asker Najaf Al Ahmed 《Arabian Journal of Geosciences》2013,6(8):2941-2949
Chemical analysis was carried out to evaluate the potentiality of rock samples having hydrocarbon characteristics, identified by chemical methods as one of the approaches to evaluate the source rocks encountered from Sehkanian, Sargelu, Naokelekan, Sarmord and Ghia Gara of (Middle to Upper Jurassic–Lower Cretaceous) stratigraphic sequence of Iraq, representing source rocks, which are recovered from oil exploratory wells Butmah-15, Ajeel-8, Makhul-2, Qarachuq (1 and 2) and TaqTaq-1 (Bm-15, Aj-8, Mk-2, Qc-1,Qc-2 and Taq-1) alternatively, located in the northern part of Iraq and also the outcrop samples extracted from the type locality at Surdash Anticline. Additional samples were taken from another exposure section of the Jurassic rocks from Banik village, those various samples represent Varity of palynofacies. The bulk of chemical analysis enables to enhance the potentiality of the source rocks, leading to believe generating tremendous amount of oil and subordinate gas promising more than earlier predictions for forming super giant oil and thermogenic gas fields in this area. The value of the production indices determines that the system of the oil in Iraq is not widely different from the depocenters of the surrounding countries. Accordingly Iraq is considered as an ideal and systematic basin that all the total petroleum system elements are available, giving indications of good source rocks, extensive reservoirs and excellent seals. Typical oil fields, which as determined by the remarkable total organic carbon exceeds 20 %, and maturation evidences accompanied with maximum temperature up to 450°C indicate obviously various values of the hydrogen and oxygen indices, kerogen type II and type III, of marine to mixed to terrestrial origin that lead to determine that the oil and gas prone Sargelu, Naokelekan and Ghia Gara were good source rocks. Meanwhile Barsarin and Sarmord were reservoir rocks. The area of study is widely promising to produce oil with condensed gas. 相似文献
2.
《China Geology》2019,2(2):133-141
Source rocks are the material basis of oil and gas generation and determine the potential resources of exploration blocks and have important research value. This paper studies the lithology, thickness, and geochemistry of Mesozoic source rocks in the southeastern East China Sea continental shelf. The results show that the Mesozoic source rocks are mainly dark mudstone and coal-bearing strata. The total thickness of Lower–Middle Jurassic source rocks ranges from 100 m to 700 m, and that of Lower Cretaceous source rocks ranges from 50 m to 350 m. The overall thickness of Mesozoic source rocks is distributed in the NE direction and their thickness center is located in the Jilong Depression. The Lower–Middle Jurassic source rocks are mainly developed shallow marine dark mudstone and transitional coal measure strata. Those of the Lower Cretaceous are mainly mudstone of a fan delta front. Lower–Middle Jurassic and Lower Cretaceous hydrocarbon source rocks are dominated by type III kerogen, with Lower–Middle Jurassic hydrocarbon source rocks having high organic matter abundance and being medium–good hydrocarbon source rocks, while Lower Cretaceous hydrocarbon source rocks have relatively poor quality. From northwest to southeast, the vitrinite reflectance Ro of Mesozoic source rocks increases gradually. Source rocks in the study area are divided into three types. The first hydrocarbon-generating area is mainly located in the southeastern region of the study area, and the Jilong Depression is the hydrocarbon-generating center. The results of this study can provide a basis for exploration of Mesozoic oil and gas resources in the southeastern East China Sea continental shelf.© 2019 China Geology Editorial Office. 相似文献
3.
The United Arab Emirates(UAE) is the 8 th largest oil producing country and is rich in oil and gas resources. By the end of 2015, 68 oil and 23 gas fields had been discovered. The initial proved and probable(2 P) oil, gas and condensate reserves amount to 81,135.9 MMb(million barrels), 192.09 Tcf(trillion cubic feet),and 6496.58 MMb respectively, which are mostly reservoired in the Jurassic and Cretaceous carbonates. With the latest field data, this study attempts to document the salient features of petroleum systems in UAE. Based on depositional facies of source rock intervals, pods of source rocks were delineated. On the basis of an oiland gas-source correlation, five known petroleum systems were identified and they are Lower Silurian-Upper Permian Khuff gas, northeast foreland Upper Jurassic-Lower Cretaceous gas, Upper Jurassic-Jurassic petroleum, Upper Jurassic/Lower Cretaceous-Lower Cretaceous composite petroleum, and Middle Cretaceous-Middle to Upper Cretaceous/Cenozoic petroleum systems. Of them, the Upper Jurassic/Lower Cretaceous-Lower Cretaceous composite petroleum system contains 73.2% of the total 2 P reserves and thus it is the focus of this study. The Upper Jurassic and Lower Cretaceous source rocks consist of argillaceous limestone, mudstone and shale, which were deposited as intrashelf basin facies. The distribution of oil and gas in this system is controlled by the source kitchens and the regional evaporite seal. 相似文献
4.
准南前陆冲断带具有丰富的油气资源,但与资源评价关系密切的烃源岩研究不足。本文应用地球化学分析方法,对准南前陆冲断带的上二叠统、中下侏罗统、下白垩统和古近系等4套烃源岩的有机质丰度、有机质类型、热演化程度进行了系统分析和综合对比。结果表明,上二叠统烃源岩和中下侏罗统烃源岩为良好的烃源岩,古近系安集海河组其次,下白垩统烃源岩相对较差。 相似文献
5.
Bandar I. Ghassal Haytham El Atfy Victoria Sachse Ralf Littke 《Arabian Journal of Geosciences》2016,9(20):744
Organic geochemical characterization of cutting samples from the Abu Hammad-1 and Matariya-1 wells elucidates the depositional environment and source rock potential of the Jurassic and Lower Cretaceous successions and the Middle Miocene to Pleistocene section in the southern and eastern Nile Delta Basin. The burial and thermal histories of the Mesozoic and Miocene sections were modeled using 1D basin modeling based on input data from the two wells. This study reveals fair to good gas-prone source rocks within the Upper Jurassic and Lower Cretaceous sections with total organic carbon (TOC) averaging 2.7% and hydrogen index (HI) up to 130 mg HC/g TOC. The pristane/n-C17 versus phytane/n-C18 correlation suggests mixed marine and terrestrial organic matter with predominant marine input. Burial and thermal history modeling reveals low thermal maturity due to low heat flow and thin overburden. These source rocks can generate gas in the western and northern parts of the basin where they are situated at deeper settings. In contrast, the thick Middle Miocene shows fair source rock quality (TOC averaging at 1.4%; HI maximizing at 183 mg HC/g TOC). The quality decreases towards the younger section where terrestrial organic matter is abundant. This section is similar to previously studied intervals in the eastern Nile Delta Basin but differs from equivalents in the central parts where the quality is better. Based on 1D modeling, the thick Middle Miocene source rocks just reached the oil generation stage, but microbial gas, however, is possible. 相似文献
6.
截止目前云南已知油页岩矿点20余处,资源量1.58亿吨,折合页岩油550万吨;含油页岩岩系自寒武系下统—新近系上新统,主要赋存于下寒武统、中泥盆统近底部、中侏罗统、上白垩统和新近系中新统、上新统等层位.除下古生界为滨海—海湾泻湖相和滨外平原相外,其他则为内陆湖泊相.大部分矿点油页岩厚度可以达到最低可采厚度1m以上,含油率也达到或超过油页岩边界品位4ω％.下古生界油页岩含油率普遍较高,最高含油率可达27.07％.云南油页岩矿资源有望成为重要的非常规油气资源. 相似文献
7.
《International Geology Review》2012,54(4):644-655
The study of the hydrogeological evolution of a region or water-carrier complex may be of great importance in estimating the oil and gas prospects of either a region or the stratigraphic section. The cycle begins with transgression, sedimentation, and accumulation of sedimentation waters, and includes the stages of regression, denudation, and seepage, and culminates in a new transgression with cessation of seepage. Such cycles may be compound if a region, developed as a unit, is broken up into segments with different hydrogeological histories — some in the seepage stage while others are submerged and experiencing a new cycle. Generalized paleohydrogeologic maps and cross-sections for the Mesozoic of the Cis-Caucasus, based on paleogeologic maps and other data by the I. M. Gubkin Joint Oil and Gas expedition of the Ministry of Economy and Mining Industry, are presented and represent either the seepage or infiltration stage. They show outcrops of water-carrier section, the lack of them, their occurrence beneath younger rocks and undersea. Four hydrogeologic stages, each consisting of two stages, are beginning with Middle Jurassic time Jurassic, Lower Cretaceous, Upper Cretaceous, and Cenozoic. --W. D. Lowry. 相似文献
8.
准噶尔盆地西北缘南部红车断裂带- 车排子凸起油气藏众多,原油物理化学性质和地球化学特征十分复杂,原油类型及其来源长期存在很大争议。本文在准噶尔盆地不同时代烃源岩生成原油典型地球化学特征与主要油源判识指标归纳总结的基础上,对红车断裂带- 车排子凸起原油地球化学特征和来源进行系统分析研究,将该区域原油分为五类,其中三类原油分别来源于二叠系湖相烃源岩、中—下侏罗统煤系烃源岩、古近系安集海河组湖相烃源岩,另外两类为混合原油,分别为来源于二叠系湖相烃源岩的生物降解稠油与中—下侏罗统煤系烃源岩生成的正常原油和古近系湖相烃源岩生成的正常原油的混合原油。红车断裂带石炭系—白垩系油藏原油主要来源于沙湾凹陷二叠系湖相烃源岩,车排子凸起东北部春风油田稠油来源于沙湾凹陷二叠系湖相烃源岩;车排子凸起东侧- 红车断裂带西侧新近系沙湾组油藏轻质原油来源于四棵树凹陷古近系湖相烃源岩;车排子凸起中部春光油田白垩系—古近系油藏稠油为二叠系来源稠油和侏罗系正常原油的混合原油,新近系沙湾组油藏稠油为二叠系来源稠油与新近系正常原油的混合原油;车排子凸起西部石炭系—古近系油藏轻质原油来源于四棵树凹陷中—下侏罗统煤系烃源岩,而新近系沙湾组油藏轻质原油来源于四棵树凹陷古近系湖相烃源岩。本文对准噶尔盆地西北缘南部地区油气藏成藏研究及区域油气勘探决策具有重要参考作用。 相似文献
9.
木里盆地有机质热演化异常及其演化史 总被引：2，自引：0，他引：2
本文讨论了木里盆地中株罗统有机质热演化异常的特征及其成因,并用盆地模拟研究了其演化史,研究表明,不仅在煤一段和煤二段之间存在着反希尔特定律的现象,而且煤二段及其上覆地层烃源岩的有机质成熟度也高于其下的煤一段及下伏地层烃源岩,这种有机质演化热异常是由热蚀变作用引起的,热演化史的研究表明,木时盆地中株罗统在晚侏罗世进入生油门限,开始生油,在白垩纪末期,由于地下水热水的上涌,使煤二段及其上覆地层的有机质 相似文献
10.
民和盆地侏罗系地层划分与对比 总被引：2，自引：0，他引：2
民和盆地是一个油、煤、气伴生的中新生代陆相盆地,侏罗系地层层序自下而上划分为下侏罗统炭洞沟组(大西沟组)、中侏罗统窑街组、红沟组、上侏罗统享堂组。中侏罗世早、中期气候温暖湿润,形成了以沼泽相煤系地层和湖相暗色泥岩、油页岩为主的生油建造,晚侏罗世至白垩纪气候较为干燥,形成了以河流相为主的砂砾岩储集建造。根据古生物、岩性、电性、含煤性、构造、古气候等地层划分对比标志,重新确立了盆地的地层系统,建立了盆地中新生界地层标准剖面,为盆地石油勘探奠定了坚实的基础。 相似文献
11.
第三次资源评价(三次资评)结果表明准噶尔盆地侏罗系石油资源量占盆地总资源量的30%以上,天然气资源量占盆地总资源量的28%,其中30. 7%的原油资源和45. 7%的天然气资源分布在准噶尔盆地的南缘,可见应深人分析南缘侏罗系主力烃源岩的特征及其生烃潜力。通过对三次资评之后勘探所积累的地质地球化学数据的系统分析,认为准噶尔盆地南缘有机质类型总体以且II2型和III型为主,纵向上发育了一套优质烃源岩(八道湾组)和两套中等丰度的烃源岩 (三工河组和西山窑组),烃源岩的规模远远大于三次资源评价的结果。这3套烃源岩均达到了成熟一过成熟的演化阶段,在白垩纪末期进入生油高峰期,在新近纪末期进入生气高峰期,生油气关键时刻与圈闭的形成和定型匹配良好,有利于形成大型和超大型油气藏。研究成果对指导准噶尔盆地南缘油气勘探具有重要的理论和实际意义。 相似文献
12.
北山地区在前寒武纪变质岩及古生代浅变质岩、火山岩基底之上发育了一系列中——新生代沉积盆地,盆内沉积了厚度较大的侏罗——白垩系,发育侏罗系和下白垩统两套生储盖组合。侏罗系组合在中口子盆地、公婆泉盆地和扎格高脑盆地发育较好,是本区寻找侏罗系油气藏的有利地区。下白垩统组合在中口子盆地、公婆泉盆地、扎格高脑盆地和黑鹰山盆地发育较好,但埋藏浅,缺乏区域性盖层,其石油地质条件不如侏罗系组合。油气勘探实践表明,该区含油气远景取决于油气保存条件和区域盖层的发育情况。 相似文献
13.
为了量化表征北黄海盆地东部坳陷中生界主力烃源岩生、排烃特征,综合利用镜质体反射率(Ro)、残余有机碳含量(TOC)、岩石热解、干酪根镜检及饱和烃色谱等资料,在总结研究区烃源岩地化特征的基础上,通过油源对比明确主力烃源岩层并依托盆地模拟方法量化其生、排烃贡献.结果表明,北黄海盆地东部坳陷中生界的两类原油均来源于区内中侏罗统和上侏罗统两套主力烃源岩层,其中,中侏罗统烃源岩的有机质丰度整体处于"好-最好"级别,上侏罗统烃源岩的有机质丰度则以"中等-好"为主;二者均存在早白垩世末期和早中新世两次生、排烃高峰,但上侏罗统的排烃速率[qe(max)=27.3×106 t/Ma]远高于中侏罗统的排烃速率[qe(max)=4.2×106 t/Ma],对研究区油气成藏的贡献更大.虽然下白垩统暗色泥岩的生烃潜力有限,但其底部砂岩与紧邻上侏罗统主力烃源岩层构成的"下生上储"式的源储配置关系是区内最重要的勘探目的层,其次为中、上侏罗统内部"自生自储"式的有利成藏组合,同时,中侏罗统下部"上生下储"式的成藏组合也应予以重视. 相似文献
14.
合肥盆地中生代地层时代与源区的碎屑锆石证据 总被引：3，自引：0，他引：3
合肥盆地位于大别造山带北侧、郯庐断裂带西侧,其发育过程与这两大构造带演化密切相关。本次工作对合肥盆地南部与东部出露的中生代砂岩与火山岩进行了锆石年代学研究,从而限定了各组地层的沉积时代,确定了火山岩喷发时间,指示了沉积物的源区。这些年代学数据表明,合肥盆地南部的中生代碎屑岩自下而上分别为下侏罗统防虎山组、中侏罗统圆筒山组或三尖铺组、下白垩统凤凰台组与周公山组(或黑石渡组)与上白垩统戚家桥组,其间缺失上侏罗统。盆地东部白垩系自下而上为下白垩统朱巷组与响导铺组和上白垩统张桥组。该盆地出露的毛坦厂组或白大畈组火山岩喷发时代皆为早白垩世(130～120 Ma)。盆地南部的下——中侏罗统及白垩系源区皆为大别造山带,分别对应该造山带的后造山隆升与造山后伸展隆升。而盆地东部白垩系的源区始终为东侧的张八岭隆起带,后者属于郯庐断裂带伸展活动中的上升盘。 相似文献
15.
《China Geology》2020,3(4):623-632
North Carnarvon Basin is a gas province with minor oily sweet spots in deepwater area with water depth more than 500 m, which is one of the hot spots of global petroleum exploration for its series of giant hydrocarbon discoveries in recent years. However, the degree of oil and gas exploration in deepwater area is still low, and the conditions for oil and gas accumulation are not clear. Based on the current exploration situation and latest database of fields, applying multidisciplinary analysis of hydrocarbon geology, hydrocarbon accumulation elements and its exploration direction of North Carnarvon Basin in deepwater area are analyzed. The results show that there are three sets of main source rocks in deepwater area of North Carnarvon Basin, which are Triassic marine shale in Locker Formation and delta coal-bearing mudstone with thin carbonaceous mudstone in Mungaroo Formation, Lower –Middle Jurassic paralic carbargilite and coal measure strata in Athol Formation and Murat Formation, Cretaceous delta mudstone in Barrow Group and marine shale in Muderong Formation. Most source rock samples show gas-prone capability. The coarse sandstone of delta facies in Middle–Upper Triassic Mungaroo Formation is the most important reservoir in deepwater area, Lower Cretaceous Barrow Group deep-water gravity flow or underwater fan turbidite sandstone is the secondly main reservoir. Lower Cretaceous marine shale in Muderong Formation is most important regional caprock. Triassic mudstone in Mungaroo Formation is an important interlayer caprock in deepwater area. There are two main reservoir accumulation assemblages in deepwater area, one is Triassic structural-unconformity plane reservoir accumulation assemblage of Locker Formation to Mungaroo Formation, and the other is Lower–Middle Jurassic Athol Formation and Murat Formation–Lower Cretaceous stratigraphic lithology-structural reservoir accumulation assemblage of Barrow Group to Muderong Formation. There are three main control factors of hydrocarbon Accumulation: One is coupling of source and seal control hydrocarbon distribution area, the second is multi-stage large wave dominated deltas dominate accumulation zone, the third is direction of hydrocarbon migration and accumulation in hydrocarbon-rich generation depression was controlled by overpressure. The south of Exmouth platform in deepwater area is adjacent to hydrocarbon rich depression zone, reservoir assemblage is characterized by “near source rocks, excellent reservoir facies, high position and excellent caprocks ”, which is the main battlefield of deepwater oil and gas exploration in North Carnarvon Basin at present. There are a lot of fault block traps in the northern structural belt of Exmouth platform, and the favorable sedimentary facies belt at the far end of delta plain in Mungaroo Formation is widely distributed, which is the next favorable exploration zone. The Lower Cretaceous, which is located at the concave edge uplift adjacent to the investigator depression and the Exmouth platform, also has a certain exploration prospect in northwest of deepwater area. 相似文献
16.
依据柴达木盆地西部阿尔金山前红沟子北部地区黑石山地质调查,结合样品的地球化学分析资料,对该区下中侏罗统的沉积特征和沉积环境进行了详细研究。其结果表明柴西阿尔金山前黑石山山顶下中侏罗统层位在横向上不见其相同层位,且岩性特征与山底区别较大,判断山顶上的下中侏罗统可能为“飞来峰”;柴西阿尔金山前下中侏罗统的沉积环境为还原环境,有利于有机质的保存和烃源岩的生成,具有一定的油气勘探前景。 相似文献
17.
山东省中生代地层划分与对比 总被引：11，自引：0，他引：11
对山东省中生代地层的研究表明：沂沐断裂带以西的鲁西南、鲁中、鲁北地区侏罗纪、白垩纪地层发育较全，而断裂带以东的钱是东地区仅发育白垩纪地层；断裂带两侧中生代地层的化石组合、火山岩特点等都相差很大。本文将沂沭断裂带以西的坊子组归于下－中侏罗纪，三台组归于中侏罗统，分水岭组暂归于上侏罗统、西洼组归于下白垩统；而将沂沐断裂带以东的莱阳组、青山组归于下白垩统。王氏组归于上白垩统。笔者废除使用蒙阴群(组)和汶南(亚)组，并建设将鲁北地区目前使用的“王氏组” 废除，另建新名。 相似文献
18.
中阿拉伯盆地是中东油气区油气资源最为富集的盆地。本文以该盆地油气田的最新资料为基础,结合盆地构造-沉积演化过程,应用石油地质综合研究方法,探讨该盆地油气的时空分布特征及主控因素。中阿拉伯盆地内发育3个主要含油气系统:下志留统含油气系统、侏罗系复合含油气系统和白垩系复合含油气系统。中阿拉伯盆地油气的层系分布表现为"下气上油",上二叠统—下三叠统储集层富集了盆地内78.9%的天然气可采储量和83.7%的凝析油可采储量,而上侏罗统—下白垩统则富集了盆地内81.9%的石油可采储量。区域上,中阿拉伯盆地的石油储量主要聚集于西海湾坳陷、迪布蒂巴赫(Dibdibah)坳陷、盖瓦尔(Ghawar)凸起和安纳拉(An N`ala)凸起,天然气和凝析油则在卡塔尔凸起更为富集。中阿拉伯盆地的油气分布主要受3个因素控制:优质区域盖层控制了油气的层系分布,主力烃源岩展布和优势运移路径控制了油气的区域分布,基底断裂和盐运动构成的圈闭控制了油气藏的形成与富集。 相似文献
19.
中国西部海相盆地地质结构控制油气分布的比较研究 总被引：3，自引：0，他引：3
中国西部塔里木、四川、鄂尔多斯等海相盆地的中、下组合是我国油气勘探的重点领域,深化研究油气分布规律是优化勘探部署、提高勘探效益与持续获得勘探发现的关键。本文从盆地地质结构控制油气分布的学术思路出发,立足于近年来的勘探新进展、新发现,应用比较分析方法,揭示油气分布的构造控制规律。研究表明,塔里木、四川、鄂尔多斯等海相盆地位于古亚洲洋构造域、特提斯构造域的复合作用区,是在前寒武纪克拉通基础上发展起来的多旋回叠合盆地;它们经历了Z-D_2、(D_3-)C_2-T、J-Q等三个伸展-聚敛旋回的演化;每一伸展-聚敛旋回发育了独立的生-储-盖组合,伸展期因差异沉降发育好的烃源岩,聚敛期发育大规模展布的储集体与圈闭组合;盆地的基底分区对后期原型盆地的发育和沉积盖层的分布具有明显的制约作用,盆地多旋回叠合,形成了"垂向分层、横向分块"的地质结构,叠合结构样式控制了油气聚集层系与富集区带,普遍存在加里东中期与印支期等两期原生油气成藏期,及燕山中期(J_3-K_1)与喜马拉雅晚期(N_2-Q)等两期油气调整成藏期,新构造运动期油气成藏较为普遍。海相叠合盆地含油气层系多,原型盆地的叠合界面常是重要的油气富集部位,隆起带、断裂带、台缘带(或岩相带)是重要的油气富集区(带),叠合盆地的中下部组合是下一步油气勘探持续突破的有利方向。 相似文献
20.
扎格罗斯盆地是我国油气公司海外勘探的重要区域。基于最新油气田资料,系统分析了盆地的油气地质特征,总结了油气分布规律,并探讨了其主控因素。结果表明扎格罗斯盆地主要发育志留系、三叠系、侏罗系和白垩系四套主力烃源岩及古近系次要烃源岩,其中白垩系烃源岩贡献最大。碳酸盐岩是盆地的主要储层类型,从二叠系至中新统均有分布,其中上白垩统班吉斯坦(Bangestan)群和渐新统-下中新统阿斯马里组(Asmari)是主力产层;碎屑岩为次要储层,大部分位于土耳其境内的托罗斯褶皱带内。受造山运动挤压褶皱作用控制,盆地主要发育背斜构造圈闭,且油气总体上表现出垂向运移的特征。分析认为迪兹富勒坳陷、基尔库克坳陷和帕卜德赫坳陷蕴含了盆地绝大多数的油气资源,且新生界和白垩系的油气最为富集,其分布规律主要受控于烃源岩展布、圈闭分布、断层和裂缝发育程度及区域盖层的共同作用。 相似文献